4x+20=21(x+2)

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Solution for 4x+20=21(x+2) equation: 


Simplifying
4x + 20 = 21(x + 2)

Reorder the terms:
20 + 4x = 21(x + 2)

Reorder the terms:
20 + 4x = 21(2 + x)
20 + 4x = (2 * 21 + x * 21)
20 + 4x = (42 + 21x)

Solving
20 + 4x = 42 + 21x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-21x' to each side of the equation.
20 + 4x + -21x = 42 + 21x + -21x

Combine like terms: 4x + -21x = -17x
20 + -17x = 42 + 21x + -21x

Combine like terms: 21x + -21x = 0
20 + -17x = 42 + 0
20 + -17x = 42

Add '-20' to each side of the equation.
20 + -20 + -17x = 42 + -20

Combine like terms: 20 + -20 = 0
0 + -17x = 42 + -20
-17x = 42 + -20

Combine like terms: 42 + -20 = 22
-17x = 22

Divide each side by '-17'.
x = -1.294117647

Simplifying
x = -1.294117647

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